I've used Nextgen on a multisite system since 2009 and it has been great.
I have just installed it on a new clean Multisite WP 3.5 install and am having problems. When I add a gallery, nothing happens. It doesn't give any confirmation that a gallery has been added, doesn't let me add images, and when I go to edit/view galleries, there are no galleries.
I've uninstalled, reset, deleted, reinstalled and it still does it. I've also disabled all plugins and gone back to TwentyTwelve. Still does the same thing.
Any ideas before I delete everything and start from scratch?
Plugins I use are: Contact Form 7, Really Simple Captcha, EasyMapPress, WP Touch Pro, and a few more.